<%@ page import="java.sql.Connection" %>
<%@ page import="java.sql.DriverManager" %>
<%@ page import="java.sql.PreparedStatement" %>
<%@ page import="java.sql.ResultSet" %><%--
  Created by IntelliJ IDEA.
  User: f
  Date: 2020/10/21
  Time: 8:26
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>

    <html>
    <head>
        <title>编辑页面</title>
        <%--引入css文件和js文件--%>
        <link rel="stylesheet" href="css/bootstrap.css">

        <script src="js/jquery.min.js"></script>
        <script src="js/bootstrap.js"></script>
        <script src="js/bootstrap.bundle.js"></script>

        <style>
            .container{
                width: 50%;
                margin-top:20px;
            }
        </style>
    </head>
<body>
<div class="container">
    <div class="row clear fix">
        <div class="col-md-12 column">
            <h3 style="text-align: center">编辑页面</h3>
            <form method="post" action="update.jsp">
                <%
                    int id = Integer.parseInt(request.getParameter("id"));

                    //加载数据库驱动
                    Class.forName("com.mysql.jdbc.Driver");

                    //建立数据库连接
                    String url = "jdbc:mysql://localhost:3306/book"; //数据库连接地址
                    Connection connection = DriverManager.getConnection(url,"root","root"); //第一个root为数据库的用户名  第二个root为数据库的密码

                    String sql = "select * from user where id = ?"; //在PreparedStatement 中使用问好代替实际参数
                    PreparedStatement ps = connection.prepareStatement(sql);

                    ps.setInt(1,id);

                    ResultSet rs = ps.executeQuery();

                    while (rs.next()){
                        out.print("<input type='hidden' name='id' value="+rs.getString("id")+">");
                        out.print("用户名:<input type='text' class='form-control' name='username' value="+rs.getString("username")+"><br>");
                        out.print("密码:<input type='text' class='form-control' name='password' value="+rs.getString("password")+"><br>");
                        out.print("性别:<input type='text' class='form-control' name='gender' value="+rs.getString("gender")+"><br>");
                        out.print("年龄:<input type='text' class='form-control' name='age' value="+rs.getString("age")+"><br>");
                    }
                %>
                <button type="submit" style="width: 100%" class="btn btn-info">提交</button>
            </form>
        </div>
    </div>
</div>
</body>
</html>